(win32_wnd_proc): No need to forward WM_ERASEBKGND to main thread.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/w32fns.c b/src/w32fns.c
index 9385d4da0c6..07001736595 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -2930,10 +2930,15 @@ win32_wnd_proc (hwnd, msg, wParam, lParam)
   switch (msg) 
     {
     case WM_ERASEBKGND:
+      /* This is (always?) generated by BeginPaint, so there is no gain
+         in forwarding this message to the main thread - it can simply
+         erase the background before repainting. */
+#if 0
       enter_crit ();
       GetUpdateRect (hwnd, &wmsg.rect, FALSE);
       leave_crit ();
       my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
+#endif
       return 1;
     case WM_PALETTECHANGED:
       /* ignore our own changes */